It looks like he’s split out the individual USB wires, run the power to the USB port, and the signal wires to different places on the exposed board, maybe to force fast mode in the charger. Then just buried everything in silicone for insulation and to keep wires from pulling loose.
un_ax@lemmy.sdf.org 7 hours ago
They removed the Battery Management System from the battery and wired it up to power as an alternative to soldering directly to the small phone board. Turns out this phone also needs usb charging at the same time because otherwise it assumes the battery is dying even if it’s not?
If anyone else is curious, they documented it here:
crackoverflow.com/…/turn_android_phone_to_battery…
old.reddit.com/…/what_do_you_think_about_my_new_h…
www.youtube.com/watch?v=7f8SliNGeDM